Adafruit Trinket - Mini Microcontroller - 3.3V Logic - MicroUSB
Part number: 1500
Description
Small is beautiful – this second generation Adafruit Trinket development board boasts even more muscle, all crammed into a postage stamp sized board (27 x 15 x 4 mm). Complete with the Atmel ATtiny85 processor with 8K of flash and 5 I/O pins, you can simply plug this kit it into any computer and reprogram it just like an Arduino thanks to the USB bootloader.